Help problems with timing ang idling!!!

[kurby]

Hello tsikoteers!

Good day!

I am having a problem with my Idling and timing, here's what happend.

I followed the excaxt procedure in my FSM and the one posted at NF (Nissan Forums) but the idle is still high though the screw was fully decreased and the timing is at 0BTDC mark on the pulley even though it's fully advanced (CW) I don't know what's happening I hope you guys can help me!

Thanks in Advance!

[tip_tipid]

medyo mahirap yata yan ah. one at a time muna tayo.
1. EFI or Carb-type ba siya.
2. yung linkage ba ng throttle eh hindi banat? may slack siya dapat.

[kurby]

Hi!

Yes, I'm sorry I forgot the post the details.

The car is
1997 Nissan Sentra S3 SS
GA16DNE Engine its EFI
228,333kms
Acquired Bnew

Here it is:

We started of by cleaning the throttle body and the IACV valve then I think the gasket wasn't replaced and the IACV wasn't sealed.

I thought it was fine then when we set the Idling speed sagad na sa dulo yung idling screw so we tried to adjust the timing pero kapag nilalagay namin sa dulo yung distributor eh ang reading sa timing light ay 5 BTDC lang sagad na iyon so binabaan namin para tumama yung idle pero yung timing ay nacompromise at wala na sya dun sa mga timing marks kaya ayun bagal ng hatak. And while adjusting the distributor nakukuryente ako, normal ba yun? although high tension yung nandun makukuryente ba talaga ko?

Pag naka idle ay 1.5krpm then umaabot ng 2k pag umaabot sya ng 2k nag tataas-baba sya na parang may bumobomba sa gas pedal tapos baba ng 1.5-1.3k rpm. Sagad na yung Idling screw nito sa baba.

Regarding dun sa throttle cable eh hindi naman sya batak slack naman sya.

Hope you guys can help!

Thanks!

Kurby

[Jakk]

paps input lang baka makatulong naencountered ko kapag meron tumatalon sa kuryente sa high tension wire or sa distributor nagwawala yong idle ko baka ganito nangyari syo.

[tuwato]

regarding dun sa kuryente - your high tension wires might have been worn out. buy a new set of HTW (ngk or OEM...don't get other brands, they suck)

check your distributor if it has oil leaking in it.

[kurby]

Bro, may tumatalon? Whajamin? May nag spark sa distributor mo?

Kasi naalala ko nuon mga 2003 nag palit kami ng iginition coil kasi after some time pag sobrang init na namamatay na yung makina tapos hirap na sya mag start... naka ilang mekaniko (na pul pul) ang nag tsek dun pati fuel pump pinag tripan sabi nya dapat daw tuloy tuloy yung gasolina baka daw duon.

Sabi ko sa kanya, safety feature yan na every 5 secs titigil talaga yung pump (eh eng eng nga!) Sa Fritzie Trading along Molino Bacoor yung shop.

Tapos meron namang instance, nung nagpa change oil kami nuoon din (2003) hindi na ulit nag start, may lumapit na mekaniko at sinasabing ECU daw yun...

Sabi ko kung ECU yan manong eh di sana hindi na nagstart eh nagstart pa eh nakarating pa nga kami dito (sa caltex yun along Aguinaldo Hi Way sa Dasma) Hindi namin pinagawa kasi kulang ang basis nya para sa prob sa ECU.

Tapos meron naman taga Nissan UN Ave na nakontak namin ang sabi nya Distributor nga daw at eng eng yung tuminigin nung unang mekaniko (yung taga fritzie) kasi ginalaw nya yung sensor ng camshaft so hindi na straight yung thin circular object na nasa loob nung dissy tapos wala na rin daw cover... Tsk tsk....

Tapos may napagtanong kami sa ADVANCE sa Pasay along Taft Ave, his name was Percy. Duon lang namin nalaman na ang sira ay ang Ignition coil ng distributor...

So far hindi na naulit yung mga pang yayari na iyon....

Then sometime 2008-2009 nag loloko yung idling, sobrang baba pag naka kinta ka (5th gear) tapos Neutral ayon namamatay kailang ibalik mo ulit sa gear para mabuhay yung makina....

Tapos inadjust yung throttle cable para tumaas yung idle... ayun tumaas nga ng sobra....

Until nabasa ko nga dito yung idling screw (at last!) kaya nung nabasa ko dali dali ko namang inadjust, so far oki na yung idling....

Then napansin ko na may mga oil na sa may valve cover at sa plugs (kapag binunot mo yung HT wire yung lumalangoy yung plugs.... pati yung O-ring ng dissy...

Ayung pinalitan ko yung mga seals na yun...

Then after some time (last week) pina check ko yung IACV-AAC Valve at sobrang dumi...

Nung ibinalik chineck ko yung idle and timing....

Yung Idle nung una oki lang nasa 650-700rpm, tapos yung timing ay wala sa kahit anung timing marks!!!!!

Then inadjust, sagad na yung dissy sa dulo (CW advanced) pero ang reading ay 5BTDC lang (3rd line sa timing mark) at eventually tumaas yung idle kaya ayun sinagad sa baba pero mataas pa rin...

Then tinest drive yung kotse, may krok krok na tunog pag 1k-2.5krpm tapos pag 3k wala na ang sabi sobra advance yung pagka timing (5BTDC) then tinanong ako kung ano gas ang naka karga, Petron XCS lang naman ang gamit ko dun.... Ang sabi tope daw yun....

Ayun bina ba yung timing sa 2nd line (0BTDC) pero may tope pa rin...

Yung throttle wire naman eh may slack hindi xa banat...

Anu kaya ang nagyari todits?

[kurby]

regarding dun sa kuryente - your high tension wires might have been worn out. buy a new set of HTW (ngk or OEM...don't get other brands, they suck)

check your distributor if it has oil leaking in it.

Nope haven't changed the HT since it was 1st bought bnew (1997).
Okay I'll look for OEM or NGK btw how much are those? hehehe Any Ideas?

Nope, new o-ring no oil leak in the dissy....

Thanks!

[nickriingen]

Much better, dalhin mo na lang sa service shop car mo. For your info, ignition timing of GA 16 DNE engine is 10 degrees BTDC, not 5 degrees. Use a suitable timing light in setting timing, RPM reading, not the usual tantiameter. Just don't let backyard mechanics tinker the sensors without the proper knowhow, equipment and service manuals. Better call this shop, Lito Motors, 892-3458. They could help you in your car's problem. Mukhang marami nang ginalaw. di pa rin tumino.

[kurby]

So far umaandar naman sya kaso hindi accurate yung reading nung timing at idling.

Anyways I'll try to call the number you gave me and post some feedbacks.

Thanks!

[tuwato]

* kurby - baka nasira nung taga nissan yung MAF sensor mo, di kasi dapat ginagalaw yun.

possible din na nagalaw na yung crank pulley mo kaya di na sakto yung timing marks. dapat pag naka sentro yung distributor e nasa 10 degrees siya.